Speakercraft volume controls are available in a wide variety of options. There are standard 'knob' style volume controls to 'slide' style and even electronic models to choose from. To choose a volume control, first decide the wattage needed (SpeakerCraft includes the power handling in the model number of their volume controls). Next, decide whether you need an impedance matching volume control (Impedance matching models have an "I" in the model number). Finally, choose a style (Knob, Slide, or Electronic). and color.